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发明名称
Improvements in collapsible gin poles for oil well masts
摘要
申请公布号
GB751829(A)
申请公布日期
1956.07.04
申请号
GB19540022086
申请日期
1954.07.28
申请人
LEE C. MOORE CORPORATION
发明人
分类号
E04H12/34;E21B15/00
主分类号
E04H12/34
代理机构
代理人
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